| 释义 |
yag|jæg|
Also YAG.
[f. the initial letters of yttrium aluminium garnet.]
A synthetic crystal of yttrium aluminium garnet, used in certain lasers and as a simulated diamond in jewellery.
1964Q. Rep. Bell Telephone Lab. No. 2 (ad 439–628). 3 The splitting of the 7Fj..manifolds of the trivalent Europium and Terbium ions..has been used to calculate crystal field parameters for Eu and Tb in YAG. 1964Appl. Physics Lett. V. 201/2 Predictions of the laser behavior were tested on singly and doubly doped YAG crystals. 1971Daily Tel. 22 Nov. 13 Have you got a yag yet? They are the latest form of simulated diamonds. Almost as hard as a sapphire, which is almost as hard as a diamond, they are ‘grown’ in America, brought over here to be faceted, set in 18-carat gold in Hatton Garden and sold as Diamonairs. 1977Jrnl. R. Soc. Arts CXXV. 779/2 The YAG laser..is used routinely..for trimming resistors. 1979[see simulant n.]. 1984National Geographic Mar. 341/2 A flash lamp can excite atoms of neodymium, a rare earth, in a rod of YAG. |